Personally, I wish they would have done both. Meaning, they should have the original scene play out with Shaw like they did in original 83 cut or the 97 SE cut then in a new SE shot after Luke looks away show the force ghost turn into their younger selves or their prequel era looks.
And it should be film with the actual two actors Hayden and Ewan to reprise their roles and to properly act out that part instead using out of context unused or test footage that will make the actors look weird and really out of place like they did with Hayden Christensen. Of course, just replace puppet Yoda with CGI Yoda.
Then here you go, you now have the best of both worlds that should make people less jaded about that change while preserving the integrity of that scene and still making a connection to the prequels, and still being respectful to Shaw and Hayden too by not removing Sebastian Shaw entirely from that scene and by not making Hayden Christensen look like a total creep either.
So, that’s my idea and thought on that matter.